What you are referring to is proper "parquetry" and the labour is generally costly as it requires more attention to detail and is more time consuming... you may be able to manage cost depending on your choice of timber (note parquetry now also comes in engineered timber which can be a bit less) but the labour will be costly regardless... my google search of "parquetry flooring Sydney" came up with a few results so hopefully you can find someone there after a few enquiries... good luck! :)

I guess some people associate 'beach' homes with weatherboard cladding, inside wall panelling, and wooden floor boards to give that relaxed vibe. I personally thing stone would also look effective and require less maintenance in comparison to the wood. Remember, sand has a tendency to scratch floorboards, therefore, over time, it may require some TLC to restore to original condition. Stone would simply require a vacuum and mop and would give a seamless look to the home.

Depends on the installer and what bamboo they're using.

What natural light do you get in the room/what orientation? i.e. is it a 'cold' or 'warm' room? If it's a colder room, I'd go with a grey with orange/red undertones to warm it up a bit, or if it's a warm room you could get away with a cooler grey, maybe green undertones to compliment the maroon. Or you could even try a green rather than grey. The Aerobus is a blueish grey so will be cooler. As others have said you would probably want a lighter tone than this for the walls (unless you're purposely going for a dark dramatic mood). 'Miller Mood' is a couple of shades up in the Colour Atlas. Get sample pots and paint a section on each wall, or paint a white bit of card and stick to the wall to see how the light is at different times of day.